가시화 엔진을 이용한 직접 분사식 압축착화 디젤엔진에서폐식용유 바이오디젤과 디젤의 분무 및 화염 특성 비교

Abstract

Spray and combustion process with waste cooking oil (WCO) biodiesel and commercial diesel wereanalyzed in an optically-accessible single-cylinder compression ignition diesel engine equipped with a high pressurecommon-rail injection system. Direct imaging method was applied to investigate spray and combustion characteristics. From the mie-scattering results, it was verified that WCO biodiesel had a longer injection delay compared to diesel. Spray tip penetration length of WCO biodiesel was longer and spray angle was narrower than those of diesel due topoor atomization characteristics. In terms of combustion, WCO biodiesel showed later start of combustion, while flamewas vanished more rapidly. Analysis of flame luminosity showed that WCO biodiesel combustion had lower intensityand lasted for shorter duration.